23626721 has 2 divisors, whose sum is σ = 23626722. Its totient is φ = 23626720.

The previous prime is 23626717. The next prime is 23626739. The reversal of 23626721 is 12762632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23571025 + 55696 = 4855^2 + 236^2 .

It is a cyclic number.

It is not a de Polignac number, because 23626721 - 2² = 23626717 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23626751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11813360 + 11813361.

It is an arithmetic number, because the mean of its divisors is an integer number (11813361).

Almost surely, 2^23626721 is an apocalyptic number.

It is an amenable number.

23626721 is a deficient number, since it is larger than the sum of its proper divisors (1).

23626721 is an equidigital number, since it uses as much as digits as its factorization.

23626721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 29.

The square root of 23626721 is about 4860.7325579587. The cubic root of 23626721 is about 286.9466447696.

The spelling of 23626721 in words is "twenty-three million, six hundred twenty-six thousand, seven hundred twenty-one".